Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luat viet he snippets" » "luat viet ha snippets", "luat vien he snippets", "luat viet ve snippets", "luan viet he snippets", "xuat viet he snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("luat viet he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luat viet he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luat viet he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luat viet he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.